Display screen or portion thereof with icon



FIG. 1 is a front image for a display screen or portion thereof with icon showing our new design; and,

FIG. 2 is an enlarged front view of the graphical user interface of FIG. 1.

The broken lines are for environmental purposes only and form no part of the claimed design.

The broken-line outline of a square shown with a short-and-long dash pattern in FIGS. 1 and 2 illustrates the bounds of the icon and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with icon, as shown and described. 